Island



(No Model.) 2 Sheets-Sheet 2.-

E. G. HAWES.

STEAM TRAP. No. 340,666. Patented Apr. 27, 1886.

' WITNEEEEEI: INVENTUR:

N ETERs. Plwwmno m her, Washington. 0.1:.

UNITED STATES I PATENT OFFICE.

EDWARD C. HAWVES, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR 'lO GEORGE HAIVES & SONS, OF SAME PLACE.

STEAM-TRAP.

SPECIFICATION forming part Of Let-ISIS Patent 340,666, dated April 27, 1886.

Application filed November 3, 1884. Serial No. 147,111. (No model.)

, To all whom it may concern.-

Be it known that I, EDWARD O. HAWES, of Providence, in the county of Providence and State of Rhode Island. have invented an Improvement in Steam-Traps, of which the fol lowing is a specification.

My invention relates to an improvement in that class of steam-traps in which an expansible vessel is employed for closing the steaminlet opening of the trap; and it consists in the combination of the expansible vessel with a separate valve, whereby the valve may be uniformly closed to its seat without being subject to a one-sided or cramping tendency, as when the side of the expansible vessel or an attachment thereto is made to perform the function of a valve, and in the combination of a removable screw-cap with the head of the adjusting-screw, whereby the screw will be prevented from turning and the steam will be prevented from escaping along the threads of the screw.

Figure 1 is an axial section of a steam-trap provided with my improvement. Fig. 2 is a perspective view of the shoe for the point of the adjusting-screw. Fig. 3 is a perspective view of the valve of the trap. Fig. 4 is an elevation of the outer case with the closinghead removed, showing the supporting-points for the expansible vessel.

In the accompanying drawings, A is the outer case or shell, made in any suitable form and having a head, a, and a flange, I), to which is secured the removable head B by means of the bolts 0.

\Vithin the chamber 0 of the trap is placed the expansible vessel D, which is partially filled with a readily-evaporated fluid, d.

The steam-inlet apertureE is provided with a composition bushing, e,which serves to form a seat for the valve I which is constructed as shown in Fig. 3, and is adapted to rest at its inner end against the side of the expansible vessel D, so that the said expansible vcssel may have a rocking movement without affecting the proper seating of the valve.

The bore of the projecting hub f of the removable head B is provided with a screwthread adapted to receive the adj usting-screw G, upon the slotted head of which is formed a screw-thread, g, which is adapted to fit the internal screw thread of the cap H, which serves to cover the head of the screw G and to form a steam-tight joint around the same, thus preventing the escape of steam along the thread of the adjusting-screw, and also serving to prevent the screw from accidental turning.

The central perforation of the head B at the side adjoining the chamber 0 is made in rectangular form in order to provide a loosely-fitting socket, Z, for the rectangular shank h of the shoe I, which serves to protect the expansible vessel from the wearing action of the point of the adjustingscrew G, the shoe I be ing prevented from rotation with the rotating screw by means of the shank hand the loosely fitting holding-socket Z.

The expansion of the fluid (1 within the expansible vessel serves to cause a bulging of the opposite sides of the same, thus closing the valve F to its seat and preventing the escape of steam from the steam-pipes until the gradual condensation of the steam to the form of water has cooled the contained vapor in the expansible vessel sufficiently to cause the valve to be raised from its seat by the overcoming pressure of the steam in the pipes, so as to allow the water of condensation to escape under the valve and to pass ofl" through the outlet-orifice j of the trap, the operation of opening and closing the valve at the inletopening being repeated as often as required to allow the water of condensation to escape from the steam'pipes to which the trap is attached.

The expansible vessel is to be supported in the chamber 0 by means of the inwardlyprojecting form of the outercase at the points s,whieh engage with the outer rim of the expansible vessel D, as shown in Fig. 4.

I claim as my invention In a steam-trap, the combination of the case, the removable head, expansible vessel, the valve, the adjusting-screw having a screwthread at its head, thebearing-shoe prevented from rotation by means of the angular shank and looselyfitting holding socket, and the screw-cap adapted for the screwthread of the head of the adjusting-screw, substantially as described.

EDIVARD C. HAXVES.

XVitnesses:

SOORA'IES SCHOLFIELD, LEONARD ScHoLFIELD.

IOC 

